/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {GrammarDefinition} from './types';

export const TemplateBlocks: GrammarDefinition = {
  scopeName: 'template.blocks.ng',
  injectionSelector: 'L:text.html -comment -expression.ng -meta.tag -source.css -source.js',
  patterns: [{include: '#block'}],
  repository: {
    transition: {
      match: '@',
      name: 'keyword.control.block.transition.ng',
    },

    block: {
      begin:
        /(@)(if|else if|else|defer|placeholder|loading|error|switch|case|default|for|empty)(?:\s*)/,
      beginCaptures: {
        1: {
          patterns: [{include: '#transition'}],
        },
        2: {name: 'keyword.control.block.kind.ng'},
      },
      patterns: [{include: '#blockExpression'}, {include: '#blockBody'}],
      name: 'control.block.ng',
      // The block ends at the close `}` but we don't capture it here because. It's captured instead
      // by the #blockBody.
      end: /(?<=\})/,
    },

    blockExpression: {
      begin: /\(/,
      beginCaptures: {
        0: {name: 'meta.brace.round.ts'},
      },
      contentName: 'control.block.expression.ng',
      patterns: [
        {include: '#blockExpressionOfClause'},
        {include: '#blockExpressionLetBinding'},
        {include: '#blockExpressionTrackClause'},
        {include: 'expression.ng'},
      ],
      end: /\)/,
      endCaptures: {
        0: {name: 'meta.brace.round.ts'},
      },
    },

    blockExpressionOfClause: {
      begin: /([_$[:alpha:]][_$[:alnum:]]*)\s+(of)\b/,
      beginCaptures: {
        1: {name: 'variable.other.constant.ng'},
        2: {name: 'keyword.operator.expression.of.ng'},
      },
      end: /(?=[$)])|(?<=;)/,
      patterns: [{include: 'expression.ng'}],
    },

    blockExpressionLetBinding: {
      begin: /\blet\b/,
      beginCaptures: {
        0: {name: 'storage.type.ng'},
      },
      end: /(?=[$)])|(?<=;)/,
      patterns: [{include: 'expression.ng'}],
    },

    blockExpressionTrackClause: {
      begin: /\btrack\b/,
      beginCaptures: {
        0: {name: 'keyword.control.track.ng'},
      },
      end: /(?=[$)])|(?<=;)/,
      patterns: [{include: 'expression.ng'}],
    },

    blockBody: {
      begin: /\{/,
      beginCaptures: {
        0: {name: 'punctuation.definition.block.ts'},
      },
      end: /\}/,
      endCaptures: {
        0: {name: 'punctuation.definition.block.ts'},
      },
      contentName: 'control.block.body.ng',
      patterns: [{include: 'text.html.derivative'}, {include: 'template.ng'}],
    },
  },
};
